Nut-lock.



E. G. DAVIS.

'NUT LOOK.

APPLICATION FILED JAN.'2, l 913. 1 070,946. Patented Aug". 19, 1913. Z Z 2T F 5 INI/E/VTUR Edward G. Dov is,

ATTORNEYS I UNITED STATES- PATENT OFFICE.

NUT-Lock.

Specification of Letters Patent.

Patented Aug. 19,1913.

A pnc ao'n filed January 2, 1913. Serial No. 739,632.

To all whom it may concern v Be'it knownthat I, EDWJRD G DAVIS, a

' citizen of the United States, and a resident joints.

readily applied I p when in place will unfailingly hold the nut 'of the opposite side through a rail of J efl'ersonville, in the county of Clark and State of Indiana, have inventeda new and Improved Nut-Lock, of which the following is a full, clear, and exact description.

My invention, although applicable generally to the locking of nuts on machinery and mechanical devices, is more especially in tended for use in locking the nuts of rail It is a designof my inventionto provide an improved nut lock device which maybe -.-and removed, and which against accidental loosening. v

In carrying out the practical embodiment of the invention, a nut-locking washer is employed, having a polygonal eye adapted to embrace the nut, and a second relativelyfixed bolt washer formed to engage the adjacent fishplate or other adjacent'element to' hold the bolt-washer against turning, the respective washers having mating formations or elements to lock and interlock with each other by turning movements of the nut and its washer relatively to the bolt washer.

The distinguishing features of my invention will be further elucidated and the important structural elements characterizing the practical embodiment, which is illustrated as an-example, will be more particularly explained in the specific description hereinafter to be given.

Reference is to be had to the ing drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a face view showing my invention applied to a railway joint; Fig. 2 is a vertical transversesection on the line 22 of Fig. 1; Fig. 3 is ahorizontal section on the line 33 of 1; Fig. 4 is a view of the joint from that illustrated in Fig. l; and Fig. 5 is a perspective view of the bolt-washer forming part of the device.

In carrying out my invention as applied to a railway joint, a washer 10 is formed with an eye 11 to adapt the washer to be slipped over the threaded shank of an ordinary bolt 12, the bolt in practice passing 13 and fishplates 14, 15. A

51 CC 0111p any- 7 to engage beneath second washer 16, has a polygonal eye 17, corresponding with'the polygonal formation of the nut 18, so that the nut washer may he slipped over the nut, to embrace the same snugly and to be caused to turn therewith.

revision is made washer 10 against turning, and for this purpose, in the present instance, I have illustrated the saidwasher as provided with a pin 19 projecting from its inner surface and adapted to be engaged in one of two recesses or sockets 2O inthe adjacent fishplate 14c, or otherelement occupying a similar position relatively to the washer in anyother machine to which the nut lock is to be-applied. These sockets 20 are spaced 90 apart, and the p1n'19' (which may be a sepafor holding the bolt rate pin driven tightly into the washer '10,

or a cast pin,) ,thus has some range of ad justment relatively to the positions of the angles of the nut 18, when the latter is tightened up or substantially sof The mating formations are provided on the respective washers as follows: In the bolt washer 10 an arcuate opening 21 is formed which may extend through or partially through the washer and is undercut, as clearly indicated in Figs. 1 and 3 for a portion of the length of the said recess to pn'oduce overhanging side walls 22 extending from an end of the slot to terminate short of the opposite end; the result of producing the described opening is to 'giye the opening the form of a keyhole slot. In this keyhole slotthere is received the flanged or headed stud 23, carried by the nut washer 16, the flanged head 24 of the stud being adapted to pass through the upper round end 25 of the keyhole slot, and then to be turned backward for thesaid flanged head the overlying flanges 22.

In practice, the bolt 12 having been passed through the fishplates and rail, the bolt washerlO is slipped over the threaded end of the bolt against the outer face of the adjacent fishplate 14, with the pin 19 of said washer in a recess 20 nut 18 is now placed on the bolt and turned to a degree of tightnessagainstthe washer 10 to hold the fishplates in proper position. The nut-locking washer 16is then placed on the nut 18, with the flanged head 24 of the pin 23 in the enlarged end 25 of the keyhole slot. The nut is now turned backward a partial turn, sufiiciently to carry the nut of said fishplate. The l against turning with, the nut.

washer 16' with vit, and thus bringing the bolt is in place, the head 12 thereof is re-- ceived'between lugs 15 on the adjacent face of the fishplate 15, whereby the bolt will be preventing from turning. Any other suitable means may be provided to hold the bolt To remove the nut it is necessary only to give it a partiallturn to the right, to bring the head 24 of the pin 23 into register with the end 25 of the keyhole slot, whereby the nut-locking washer l6-may be removed axially.

The described construction-affords a practical means for carrying my invention into effect, in a simple manner, and I would state. in conclusion, that I do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied within the scope of the claim without departure from; the spirit of the invention. 7

Having thus described my invention, I

claim as new, and desire to secure by Letters Patent:

The combination, with a bolt and nut, and elements to be clamped thereby, said elements presenting a member for holding the bolt against turning, of a bolt washer, said washer having a pin, and the adjacent elements to be clamped having recesses spaced about 90 apart, adapted to receive said pin, whereby said Washer will be held against turning, a nut-locking washer having a polygonal eye to conform to the nut to be locked, and to cause the washer to turn with said nut, the bolt-washer having an arcuate keyhole slot with overhanging walls at the contracted portion of the slot,- the nut-locking washer having a headed pin adapted for movement in said keyhole slot.

In testimony "whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

EDWARD e. DAVIS.

Witnesses:

NnvAsToN F. DAVIS, WILMEB T. Fox.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C." 

